Natrise 15mg

Natrise 15mg is an aquaretic drug which functions as a selective, competitivevasopressin receptor 2 (V2) antagonist will prevent hyponatremia (low blood sodium levels) along with congestive heart failure, cirrhosis, and the syndrome of inappropriate antidiuretic hormone (SIADH) Natrise 15mg decrease the level of a hormone whichmanage the balance of water and salt (sodium) in the body. High levels of this hormone can cause an imbalance that causes low sodium levels and fluid retention.

Tolvaptan

Natrise

15mg

Sun Pharmaceuticals




Indication of
Natrise 15mg

Natrise 15mg is used for the treatment of clinically important hypervolemic and euvolemic hyponatremia contains patients with heart failure and Syndrome of Inappropriate Antidiuretic Hormone (SIADH).

Mechanism of action of Natrise 15mg

Tolvaptan is a type of selective and competitive arginine vasopressin receptor 2 antagonist. Vasopressin show action on the V2 receptors found in the walls of the vasculature and luminal membranes of renal collecting ducts. By stopping V2 receptors in the renal collecting ducts, aquaporins do not enter themselves into the walls henceinhibiting water absorption.

This activitybasically results in arise in urine volume, reduce urine osmolality, and increase electrolyte-free water clearance to decrease intravascular volume and ahigher serum sodium levels. Tolvaptan is specificallyrequired for heart failure patients as they have higher serum levels of vasopressin.



Pharmacokinetic

Time to peak plasma concentration of Natrise is 2-4 hours and the absolute bioavailability is unknown. Food will not affect the bioavailability of Natrise.

The plasma protein bounding of Natrise is 99% and Volume of distribution in healthy subjects is 3L/kg.

Natrise is metabolism occurs by CYP3A4 enzyme in the liver.

< 1% is excreted in the urine (unchanged form) and through fecal is very small amount of renal elimination. In oral dose, half-life of Natrise is 12 hours




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Natrise 15mg
Brand Natrise
Ingredients Tolvaptan
Strength 15mg
Manufactured Sun Pharmaceuticals
Rating

Dosage and administration of Natrise 15mg

The recommended starting dose for Natrise is 15 mg administered once daily without food. The dose is increased to 30 mg once daily, after at least 24 hours, to a maximum of 60 mg once daily, as required to achieve the desired level of serum sodium. Do not administer Natrise for more than 30 days to minimize the risk of liver injury.

Following discontinuation from Natrise, advised the patients to resume fluid restriction and should be observed for changes in serum sodium and volume status. Administration of Natrise should be without food Grape juice should be avoided during therapy with Natrise

Overdose

Administrating monotherapy oral doses up to 480 mg and multiple doses up to 300 mg once in a day for 5 days have been well accepted in studies in healthy subjects. There is no essentialantitoxin for Natrise intoxication.

The signs and symptoms of an acute overdose can be expected to be those of extra pharmacologic effect: aincrease in serum sodium concentration, polyuria, thirst, and dehydration/hypovolemia.

Precaution

The conditions like Hypernatremia, hypovolemia, and/or dehydration; provoke patient to drink whenever thirsty Risk of potassium level increased Natrise 15mg produce Osmotic demyelination syndrome is a harmalong with too-fast correction of hyponatremia

Natrise 15mg can develops serious and likely fatal liver injury; acute liver failure needed liver transplantation reported; discontinue if laboratory abnormalities or signs or symptoms of liver injury are apparent.

Drug-drug interaction of Natrise 15mg

  • Natrise 15mg interaction with strong CYP3A4 inhibitors like ketoconazole will have highest labelled dose would be normal to cause an even heavy increase in exposure.
  • Natrise co administration with moderate CYP3A4 inhibitors willincrease in exposure of Natrise 15mg
  • When concomitant use treated with P-gp inhibitors will have reductions in the dose of Natrise 15mg
  • Combination of rifampin and Natrise 15mg decrease exposure to tolvaptan by 85%.
  • Concomitant use of lovastatin, digoxin, furosemide, and hydrochlorothiazide has no clinically relevant impact on the exposure to Natrise 15mg

Contraindication

Natrise 15mg is contraindicated with following condition as Patients with autosomal dominant polycystic kidney disease because the drug causes severe and possible fatal liver injury.

Required in acutely raised serum sodium, Patients inability to sense, Hypovolemic / hyponatremia



Pregnancy category is C: There are no sufficient and well tolerated studies of Natrise 15mg tablets but can be used during pregnancy only if the possible benefits prove the possible risk to the foetus.

Natrise 15mg excreted in human milk is unknown because most of the drugs are excreted into human milk, due to probable for severe adverse reaction in nursing infants from Natrise tablets, taking into consideration the Natrise tablets importance to the mother, a decision should be taken to discontinue breastfed or Natrise 15mg drug

Store the Natrise 15mg at 25°C (77°F) exclusively permitted between 15°C and 30°C Keep away from the children’s reach.

In case the single dose is missed the have the tablet dose immediately before the next dose timing reaches or skip the missed dose and continue the regular schedule. Avoid having of extra dose at a time. Consult the doctor for further details.

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